//
//  VROBillboardConstraint.h
//  ViroRenderer
//
//  Created by Raj Advani on 3/9/16.
//  Copyright © 2016 Viro Media. All rights reserved.
//
//  Permission is hereby granted, free of charge, to any person obtaining
//  a copy of this software and associated documentation files (the
//  "Software"), to deal in the Software without restriction, including
//  without limitation the rights to use, copy, modify, merge, publish,
//  distribute, sublicense, and/or sell copies of the Software, and to
//  permit persons to whom the Software is furnished to do so, subject to
//  the following conditions:
//
//  The above copyright notice and this permission notice shall be included
//  in all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
//  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
//  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
//  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
//  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
//  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
//  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef VROBillboardConstraint_h
#define VROBillboardConstraint_h

#include "VROConstraint.h"

enum class VROBillboardAxis {
    X,
    Y,
    Z,
    All
};

class VROBillboardConstraint : public VROConstraint {
    
public:
    
    VROBillboardConstraint(VROBillboardAxis freeAxis) :
        _freeAxis(freeAxis) {}
    
    VROMatrix4f getTransform(const VRORenderContext &context,
                                     VROMatrix4f transform);

private:
    
    VROBillboardAxis _freeAxis;
    
    VROQuaternion computeAxisRotation(VROVector3f lookAt, VROVector3f defaultAxis,
                                      VROVector3f objToCamProj);
    
};

#endif /* VROBillboardConstraint_h */
